Drug Resistancet Fades Quickly in Key Aids2 Drug International medical guidelines call for5 pregnant women with advanced HIV to get a combination of AIDS drugs including nevirapine to prevent passing their infection on to their newborns during delivery. But in poor countries, combinations have been expensive and nevirapine has often been Used al. one, since studies have shown that a single dose can cut the transmission rate in half. The further out you get from that exposure to single dose nevirapine, the less detectable nevirapine resistance is6, said Shahin Lockman of the Harvard School of Public Health in Boston7. She says waiting period for women who get the single dose of nevirapine at delivery can be as short as six months. If they started nevirapine-based treatment six or more months after nevirapine exposure, their treatment response8 was just as good, and really quite high, compared to women who did not have the single dose of nevirapine, she added. However, the women who started nevirapine-based treatment within six months of that nevirapine exposure were much more likely to experience treatment failure. I.ynne Mofenson is chief of research on child, adolescent, and maternal AIDS at the U. S. National Institute of Child Health and Human Development10. She says the finding supports a World Health Organization H recommendation restricting a single dose of nevirapine only to pregnant HIV-infected women who are healthy enough to wait six months after childbirth for more nevirapine-based therapy. Otherwise, they should get other drugs during labor. It shows the importance of screening women for treatment while they are pregnant and putting them on appropriate therapy while they are pregnant to avoid having to start them too soon after they received preventive therapy, she explained. 练习: A It is a broad-spectrum antibiotic and kills all kinds of bacteria. C It prevents the transmission of the AIDS virus and protects one from heart attack. 2. Why does HIV resistance against nevirapine build very quickly even when the drug is used alone just once? B Because there may not be a susceptibility test before using the drug. D Because there are too many mutations of HIV for nevirapine to deal with. A She may start nevirapine-based treatment soon after her delivery. C She has to wait at least six months after that nevirapine exposure. 4. We may learn from this passage that HIV resistance against nevirapine B will last forever in a woman who took nevirapine. D is a problem too difficult to be solved. A negative C uncertain 答案与题解 1.D 第一段第一句及第二段第二句均提到nevirapine可以防止母亲在分娩时将HIV病毒传染给新生儿的问题,故D项是正确答案。 3.C 第四段第二句说到,等待的时间最短可到六个月,第五段第一句又说,最少等待六个月的妇女,她们以nevirapine为主的药物综合治疗的疗效要比等待不足六个月的妇女高70%,可见C项最少要等待六个月是正确答案。 5.B 第一段是文章的提要,最能说明作者观点,其中最后一句就明确提到,已经服用 nevirapine的已感染上HIV的母亲们不应该放弃服用这种能用得起的药物。而且通篇文章都在探讨如何更有效地利用此药物,因此作者对使用此药的态度应该是积极的、肯定的。
双语:未来“台湾塔”
转基因的奥运会运动员?
271件毕加索作品重见天日?
澳大利亚青年欲破世界最长说唱纪录
学礼仪 迎奥运
韩电视台曝光奥运开幕式遭谴责
“跳水沙皇”萨乌丁:北京奥运会没有遗憾
奥运篮球运动员将被“随位安保”
双语美文:感恩节让心中充满感谢
今年圣诞不寂寞 “扁平爸爸”相作伴
走马观花看美国:芝加哥繁华下的另一面
崔始源林依晨加盟内地版《绯闻女孩》
双语:妈咪摇滚DJ席卷纽约
中国蹦床选手有望奥运大显身手
玛丽亚凯莉带孕大秀59美元平价钻戒
巴基斯坦女运动员:参加奥运就是梦想成真
大小贾斯汀共享“恋爱秘籍”:冷静承诺
20世纪最无聊一天:1954年4月11日
帕丁森女友遭揩油狂吃醋 狼人成情敌
婚姻新杀手: 美1/5离婚案与Facebook有关
小贝一家健身狂 贝嫂热衷深夜跑步
双语美文:人生中的“蝴蝶效应”
刘欢、莎拉•布莱曼将演唱奥运主题歌
印度:个人奥运首金 举国同庆
林赛罗韩感恩节奢侈品店大“血拼”
“黑马”常永祥 中国奥运摔跤“银”突破
台湾女性不惧当“剩女”
《绝望主妇》各集结束语精选
双语:牙膏会让胎儿大脑受损?
巴西男足教练:“奥运会夺金比世界杯夺冠难”
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |